[ja] Apply c267f27
[pt-br] Update 01-chapter4.markdown

[pt-br]

Concordance, punctuation, plural and another mistakes corrected.

Concordância, pontuação, plural e outros erros corrigidos.
Merge pull request #550 from nmoura/patch-6

[pt-br] Update 01-chapter4.markdown
Update 01-chapter3.markdown

General translation fixes
Update 01-chapter3.markdown

General fixes
Merge pull request #551 from paulodrjr/master

[pt-BR] Update 01-chapter3.markdown
Merge pull request #543 from harupong/ja-chapter3

[ja] Apply c267f27